Release script

.gitignore

@@ -1,6 +1,12 @@
+# IDE configurations
 .vscode
 .idea
 *.iml
 
+# Output and logs
 *.log
 *.out
+
+# Releases
+*.zip
+*.tar.gz

release.sh

@@ -0,0 +1,223 @@
+#!/bin/bash
+
+ROOT=$(dirname "$0")
+
+INCLUDED_FILES="dynatrace_exporter.py dynatrace_exporter.yml requirements.txt LICENCE README.md"
+
+RELEASE_BRANCH_PREFIX="release/"
+RELEASE_BRANCH_PREFIX_REGEX="${RELEASE_BRANCH_PREFIX/\//\\\/}"
+SEMVER_REGEX="(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(-[alpha|beta]\d*)?"
+
+CMD_CREATE_VERSION=0
+CMD_LIST_VERSIONS=0
+CMD_LATEST_VERSION=0
+
+VERSION=""
+TYPE=""
+LIST_LIMIT=20
+
+show_help() {
+    cat << EOM
+Small script to help handling versions and release.
+
+It helps you creating versions by automatically incrementing major, minor or patch part of the version, or creating a version of your choice.
+Version must follows semantic versionning pattern (X.Y.Z, X=major, Y=minor, Z=patch).
+It will create the branch 'release/X.Y.Z', the tag 'vX.Y.Z' and both zip and tar.gz archives.
+   
+Usage: 
+$ROOT/release.sh [-h|--help] [-l|--last] [-l|--list] [-c|--create <MAJOR|MINOR|PATCH|version>]
+
+  -h --help               Display this help
+  --last                  Print most recent version
+  -l --list               List already created versions. use --limit to change max number of displayed versions
+      --limit $LIST_LIMIT              Limit number of version to print with option --list
+  -c --create <version>   Create a new version. 
+                          Valid values are : MAJOR, MINOR, PATCH or a version number following semantic versioning format x.y.z
+                          - MAJOR: skip to next major version. Eg: if last version is 1.2.3, version 2.0.0 will be created
+                          - MINOR: skip to next minor version. Eg: if last version is 1.2.3, version 1.3.0 will be created
+                          - PATCH: increment patch version by one. Eg: if last version is 1.2.3, version 1.2.4 will be created
+                          After creating the branch, the tag and the archives, you should create the yourself on GitHub, selecting the newly created tag.
+EOM
+}
+
+echoeval(){
+  echo "$*"
+  eval "$*"
+}
+
+get_part(){
+  echo $1 | cut -d . -f $2
+}
+
+get_major(){
+  get_part $1 1
+}
+
+get_minor(){
+  get_part $1 2
+}
+
+get_patch(){
+  get_part $1 3
+}
+
+fetch_last_versions(){
+  limit="$1"
+  git branch -a | grep -oP "${RELEASE_BRANCH_PREFIX_REGEX}${SEMVER_REGEX}$" | sort -Vr | head -$limit | sed s+"${RELEASE_BRANCH_PREFIX_REGEX}"+''+ | grep -oP $SEMVER_REGEX
+}
+
+
+inc_version_major(){
+  last=$(fetch_last_versions 1)
+
+  major=$(get_major $last)
+  inc=$(( $major + 1 ))
+
+  echo "$inc.0.0"
+}
+
+inc_version_minor(){
+  last=$(fetch_last_versions 1)
+
+  major=$(get_major $last)
+  minor=$(get_minor $last)
+  inc=$(($minor + 1))
+
+  echo "$major.$inc.0"
+}
+
+inc_version_patch(){
+  last=$(fetch_last_versions 1)
+
+  major=$(get_major $last)
+  minor=$(get_minor $last)
+  patch=$(get_patch $last)
+  inc=$(($patch + 1))
+
+  echo "$major.$minor.$inc"
+}
+
+handle_version_value(){
+  original="$VERSION"
+
+  if [[ ! "$VERSION" =~ (MAJOR|MINOR|PATCH|$SEMVER_REGEX) ]]; then
+    echo "ERROR: Version format is invalid: $VERSION (original value was: $original)"
+    exit 1
+  fi
+
+  if [[ "$VERSION" =~ (MAJOR|MINOR|PATCH) ]] && [[ "$(fetch_last_versions 1)" == "" ]]; then
+    echo "ERROR: No published version yet. Cannot increment $VERSION. Please provide a version to create the first one."
+    exit 1
+  fi
+
+  if [[ "$VERSION" == "MAJOR" ]]; then 
+    VERSION=$(inc_version_major)
+  elif [[ "$VERSION" == "MINOR" ]]; then  
+    VERSION=$(inc_version_minor)
+  elif [[ "$VERSION" == "PATCH" ]]; then  
+    VERSION=$(inc_version_patch)
+  else
+    existing="$(git branch -a | grep -oP "${RELEASE_BRANCH_PREFIX_REGEX}${VERSION}$")"
+
+    if [[ "$existing" != "" ]]; then
+      echo "ERROR: version $VERSION already exists."
+      echo "Please use --list to see already existing versions."
+      exit 1
+    fi
+  fi
+}
+
+get_archive_name(){
+  echo "dynatrace_exporter-$VERSION"
+}
+
+_cmd_list_versions(){
+  echo "Listing last $LIST_LIMIT versions:"
+  fetch_last_versions $LIST_LIMIT
+}
+
+_cmd_show_last_version(){
+  echo "Latest version: "
+  fetch_last_versions 1
+}
+
+_cmd_create_version(){
+  current_branch=$(git rev-parse --abbrev-ref HEAD)
+
+  handle_version_value
+
+  remote=$(git remote | head -1)
+
+  echo "Version $VERSION will be created."
+  echo ""
+  echo "Updating local repository..."
+  echoeval git pull
+  echo ""
+
+  branch_name=$RELEASE_BRANCH_PREFIX$VERSION
+  echo "Creating branch $branch_name..."
+  echoeval git checkout -b $branch_name
+  echo ""
+
+  tag="v$VERSION"
+  echo "Creating tag $tag..."
+  echoeval git tag $tag
+  echo ""
+
+  echo "Publishing branch and tag to remote repository..."
+  echoeval git push $remote $branch_name
+  echoeval git push --tags
+  echo ""
+
+  archive_name=$(get_archive_name)
+  zipfile="$archive_name.zip"
+  targzfile="$archive_name.tar.gz"
+  echo "Creating archives $zipfile and $targzfile..."
+  echoeval zip $archive_name.zip $INCLUDED_FILES
+  echoeval tar -czf $archive_name.tar.gz $INCLUDED_FILES
+  echo ""
+
+  echo "returning back to previous branch $current_branch..."
+  git checkout $current_branch
+
+  echo "DONE!"
+}
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    -h|--help)
+      show_help
+      exit 0
+      ;;
+    --last)
+      CMD_LATEST_VERSION=1
+      ;;
+    -l|--list)
+      CMD_LIST_VERSIONS=1
+      ;;
+    --limit)
+      LIST_LIMIT="$2"
+      shift
+      ;;
+    -c|--create)
+      CMD_CREATE_VERSION=1
+      VERSION="$2"
+      shift
+      ;;
+    -*|--*)
+      echo "Unknown option $1"
+      exit 1
+      ;;
+  esac
+  shift
+done
+
+if [[ $CMD_LATEST_VERSION == 1 ]]; then
+  _cmd_show_last_version
+elif [[ $CMD_LIST_VERSIONS == 1 ]]; then
+  _cmd_list_versions
+elif [[ $CMD_CREATE_VERSION == 1 ]]; then
+  _cmd_create_version
+else
+  show_help
+fi